Catalytic performance of Pt-supported modified red mud catalyst for toluene catalytic oxidation
FANG Hong-ping1,2, LIANG Wen-jun2, MA Chen2, MA Lian-gang1, LI Gui-xian1
1. Faculty of Resource and Environmental Engineering, Guizhou Institute of Technology, Guiyang 550003, China; 2. Key Laboratory of Beijing on Regional Air Pollution Control, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Abstract：A low-cost modified red mud supported Pt catalyst was prepared by impregnation method, and the effect of Pt content on catalytic oxidation activity of toluene on Pt/MRM catalyst was investigated. 0.4Pt/MRM showed the best catalytic activity, and the toluene conversion rate reached 100% at 230℃. The catalytic activity of 0.4Pt/MRM was still higher when the airspeed was up to 120000h-1. Toluene can be oxidized effectively in a wide range of toluene concentrations. XRD, FT-IR, BET, H2-TPR and O2-TPD were used to characterize. The specific surface area of MRM was significantly higher than RM, which can disperse the active component Pt better and become a suitable catalyst carrier for the active component Pt. The prepared xPt/MRM catalyst had high surface area and good pore structure. The interaction between Fe2O3 and Pt species in the modified red mud increased the total oxygen desorption capacity of the catalyst, improved the mobility of oxygen on the catalyst surface, and the catalytic efficiency.
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